Throughout history, microorganisms have been primarily known for their role as agents of severe diseases in humans, animals, and plants. Everyone remembers the recent COVID-19 pandemic, caused by SARS-CoV-2, a novel virus pathogenic to humans that led to millions of deaths worldwide. However, most microorganisms are not harmful to humanity; on the contrary, they play a fundamental role in maintaining ecosystem balance.

Almost 4 billion years ago, the first living beings to inhabit our planet were microorganisms, in a vastly different Earth from the one we know today. The first microorganism to populate the Earth's surface is known as LUCA, an acronym for Last Universal Common Ancestor. When the first photosynthetic organisms, cyanobacteria, emerged, they generated large amounts of oxygen, radically transforming the Earth's primitive atmosphere, which previously contained little to no free oxygen. This phenomenon, known as the Great Oxidation Event, marked a planetary-scale change, though that is another story.

THE EXTRAORDINARY ADAPTABILITY OF MICROORGANISMS

These tiny life forms can survive in extreme environments such as the Mariana Trench, the deepest known point in the world's oceans, nearly 11,000 meters below the surface, where pressure is 1,000 times greater than at sea level. There are also microorganisms, known as hyperthermophiles, that thrive in volcanic hot springs at temperatures near boiling point. Others survive in polar ice caps at -20°C, well below freezing. True survivors!

A single bacterium can multiply billions of times within just 24 hours under optimal conditions. From a single individual, billions can arise in a single day. Furthermore, microorganisms possess an incredible adaptability thanks to their metabolic diversity, allowing them to use a wide variety of nutrients to survive. A few years ago, it would have been difficult to imagine that a microorganism could use plastic as a source of carbon and energy. However, more species with this ability are being discovered, opening the possibility of a future where microorganisms play a key role in reducing plastic pollution.

ANCIENT ALLIES IN OUR DAILY LIVES

For thousands of years, humanity has had a close and long-standing relationship with microorganisms, making them valuable allies in everyday life. They have played a fundamental role in fermentation, aiding in the production of bread, beer, wine, yogurt, cheese, and other foods. The ancient Egyptians were already using yeast to ferment bread and beer thousands of years ago.

In agriculture, for centuries, some microbes (such as nitrogen-fixing bacteria) have been essential for improving soil fertility and increasing crop yields. They have also played a crucial role in organic waste decomposition, enabling nutrient recycling in natural environments. Almost any soil or body of water harbors a microscopic ecosystem of bacteria, fungi, algae, and viruses, as complex as the ecosystem of higher organisms in the Amazon rainforest.

GAIKER’S ROLE IN BIOREMEDIATION STRATEGIES FOR A SUSTAINABLE ENVIRONMENT

Now, microorganisms are once again proving to be valuable allies in restoring an environment altered by human activity. They can break down pollutants released into nature by industrial activities, transforming them into harmless compounds and helping damaged ecosystems recover. This is particularly useful for cleaning up oil spills, toxic chemicals, and heavy metals, using bacteria, fungi, and other microorganisms capable of "eating" these contaminants present in soil, water, or air.

In biotechnology, the scientific discipline dedicated to studying how microorganisms can be used to clean contaminated ecosystems is called bioremediation. This method allows for the recovery of polluted areas without the need for costly or environmentally damaging interventions.

At the GAIKER technology center, we have been studying microbiological bioremediation technologies for years, developing effective alternatives to environmental pollution issues. We participate in research projects in collaboration with other centers, institutions, and companies to find innovative solutions, leveraging the extraordinary abilities of microorganisms.

Microorganisms naturally act in contaminated sites without human intervention, using those pollutants as sources of energy and carbon. As they multiply, they simultaneously eliminate toxic compounds. GAIKER’s work includes determining the best microbiological bioremediation strategy for each contamination issue and location. In simpler terms, we develop technical approaches to remove contaminants using the natural microbial populations present in affected sites. Our goal is to boost these "cleaning" microorganisms, providing them with the necessary conditions and nutrients to perform their task more efficiently and quickly.

It is essential to recognize the vital role that microorganisms, our ancient allies, play in building a sustainable future.